# 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) — US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side

For 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200), pel (ppm) is 0.01; pel (mg/m³) is 0.08; stel (ppm) is 0.1; stel (mg/m³) is 0.8, verified against its source on 2026-08-05.

- **Substance:** 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200)
- **PEL (ppm):** 0.01
- **PEL (mg/m³):** 0.08
- **STEL (ppm):** 0.1
- **STEL (mg/m³):** 0.8

## What the source says

> 101779 | S | 4,4′-Methylene dianiline; MDA (see also Sections 1535 & 5200) | 0.01 | 0.08 | | 0.1 | 0.8

## Source

- https://www.dir.ca.gov/title8/5155.html

Last verified: 2026-08-05. Review by: 2027-08-05.
Part of [US workplace chemical exposure limits: federal OSHA vs Cal/OSHA, side by side](https://referencesource.org/workplace-exposure-limits/).